As Vesuvan Shapeshifter enters the battlefield or is turned face up, you may choose another creature on the battlefield. If you do, until Vesuvan Shapeshifter is turned face down, it becomes a copy of that creature and gains "At the beginning of your upkeep, you may turn this creature face down."
(You may cast this face down as a 2/2 creature for
. Turn it face up any time for its morph cost.)